/*
 * Copyright 2010-2015 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jetbrains.kotlin.idea.highlighter

import com.intellij.execution.lineMarker.ExecutorAction
import com.intellij.execution.lineMarker.RunLineMarkerContributor
import com.intellij.psi.PsiElement
import org.jetbrains.kotlin.descriptors.FunctionDescriptor
import org.jetbrains.kotlin.idea.KotlinIcons
import org.jetbrains.kotlin.idea.MainFunctionDetector
import org.jetbrains.kotlin.idea.caches.resolve.resolveToDescriptor
import org.jetbrains.kotlin.psi.KtNamedFunction


class KotlinRunLineMarkerContributor : RunLineMarkerContributor() {
    override fun getInfo(element: PsiElement): Info? {
        val function = element.parent as? KtNamedFunction ?: return null

        if (function.nameIdentifier != element) return null

        val detector = MainFunctionDetector { function ->
            function.resolveToDescriptor() as FunctionDescriptor
        }

        if (detector.isMain(function)) {
            return RunLineMarkerContributor.Info(KotlinIcons.SMALL_LOGO_13, null, ExecutorAction.getActions(0))
        }

        return null
    }
}